Friction-tor can-sealer



F. CRAWFORD.

FRICIwN. TOP CAN SEALER. APPLlcATAluN. man acnz. 191.9.

1,392,867. Patented-0...., 1921.

- 2 SHEETS-SHEET l. FZJ/ v L ATToRNEYs.

F. CRAWFORD. Fm'cnoN 10P CAN. SEALER; A-PPLlcATloN FILED om. 1919.

Patented Oct. 4, 1921..

'2 SHEETS-SHEET 2.

` INVENTOR. fr.' ('74 20v/a 7d.

A TT ORNE Y.$

UNITED STATES PATENT OFFICE.

FRANK CRAWFORD, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO CHARLES C. BURNETT, OF LOS ANGELES, CALIFORNIA.

FRICTION-TOP CAN-SEALER.

T o all w zom it may concern.'

Be it known that I, FRANK CRAWFORD, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Friction-Top Can- Sealers, of which the following is a specification.

My object is tol make a frictiontop can sealer and my invention consists of the novel features herein shown, described and claimed.

' tion.

Fig. 3 is a horizontal sectional detail on theline 3-'3 of Fig. 1 and looking downwardly as indicated by the arrows.

Fig. 1 is a fragmentary vertical cross section on the line 4 4 of Fig. 1 and looking in the direction indicated by the arrows.

the.V same plane as Fig. 1 and showing the parts in position to seal the can.

The base l is flat in side elevation and substantially oval in plan and the base 1 is adapted to be rigidly secured to a floor or bench by screws 2. The post 3 extends upwardly from near the rear end of the base 1. A platform 4 extends forwardly from the post 3 in vertical alineinent with the forward part of the base-1 and a considerable distance above the base. The platform 4 is adapted to receive a can 5 to be sealed. A bearing bracket 6 extends forwardly from the upper end of the post 3 and a vertical bearing 7 is formed in the forward end of the bracket 6 in vertical alinement with the center of the platform 1. The drive shaft 8 Vis mounted in a shaft housing 9 and has a driving belt pulley 10 upon its rear end. A bifurcated bearing 11 extends downwardly from the rear end of the housing 9 and the extreme upper end 12 of the post 3 fits in the bifurcation of the bearing 11 and the pin 13 is inserted through the bearing 11 and the end 12 so as to pivotally mount the housing Specification of Letters Patent.

Fig. 5 is a fragmentary sectional detail on Patented Oct. 4, 1921.A

Application led October 27, 1919. Serial No. 333,714.

9 and shaft 8. A pintle 14 extends downwardly from a sleeve fitting upon the shaft 8 against the forward end of the housing 9 and an expansive coil spring- 15 tits around the pintle 14 against the housing 9 and tits against the spring seat 16 at the upper end of the post 3 and the upper side of the bracket 6, the'tension of the spring bein exerted to press the forward end of the shaft 8 upwardly to a limited extent.

The spring seat 16 is formed integral with a supporting screw 16a and the supporting screw is tapped into a boss 1Gb formed at the upper end of the post 3 and at the upper side of the bracket 6, so that tbe spring seat 16aN may be adjusted up and down by rota-ting the screw.

A flange 17 is fixed upon the forward end of the shaft 8, a friction wheel 18 lits upon the shaft 8 against the flange 17 and a nut 19 is screwed upon the forward end of the shaft 8 against the friction wheel 18.

A hollow plunger 2O lits slidingly in the bearing 7, a head 21 fits upon the lower end of the plunger below the bearing 7 and is held removably in place by a set screw 22. An expansive coil spring 23 fits around the plunger 2() against the upper lend of the bearing 7. A spring sea-t 24 is screwed upon the upper end of the plunger 20 against the spring 23. The tension of the spring 23. is exerted to hold the plunger 20 elevated and the head 21 against the bearing 7.

An arm 25 extends outwardly and upwardly from near the upper end of the post 3, a branch arm 26 extends forwardly from near the upper end of the arm 25, a spring seat 27 is formed upon the branch arm 26, a spring 28 rests upon the spring seat 27, a lever 29 is connected to the bearing 3() formed at the upper end of the arm ,25 by a'pin 31 and the lever 29 extends forwardly' and rests upon the spring 28. A pin 32 extends downwardly from the arm 29 through the spring 28 and through an opening in the spring seat 27 so as to hold the spring in pla-ce. A fooi; lever 33 is connected to a bearing 311 said bearing 311 extending upwardly from the base 1 at one side of the post 3 and the lever 33 extending forwardly at one side of the platform 4i; and below the platform. A link 35 is connected to the foot lever 33 in front of the bearing 34 and the link 35 extends upwardly loosely through the lever 29 and a. nut 36 is screwed upon the upper' end of the link Vso that the vtension of the spring 28 will raise the forward end of the lever 29 thereby raising the forward end of the foot lever 33 and so that when the forward end of the foot lever 33 is forcibly depressed the forward end of the lever 29 will be pulled'downwardly by the link 35. A fork 37 is formed u pon the forward end of the lever 29 and the fork 37 straddlesthe upper end of the plunger 20 Vand rests upon the spring seat 24 so that when the lever 29 is pulled downwardly the spring 23 is compressed and the head 21 moved downwardly.

The camshaft 38 is slidingly mounted through the plunger 20 and vhas a vconical cam 39 upon its lower end. The conical cam 39. operates inthe vertical opening 40 formed through the head 21 in line with the opening in the plunger 20. A friction disk 41 is fixed upon the upper end ofthe cam shaft 38 above'the fork 37 and in position to engage thefriction wheel 18.'

' An arm 42 extends outwardly and upwardly from near the upper end of the post 3 at the opposite side from the arm 25. A branch arm 43 extends forwardly from near the upper end of the arm 42. A spring seat 44 is formed yupon the branch arm 43. Y A.

spring 45 rests upon the spring-.seat 44. A bearing 46 is formed at the upper end of the arm 42. A lever 47 has a bifurcated bearing 48 fitting the bearing 46 and a pin 497e);- tends through the bearings 48 and 46. A stud 50 is fixed inthe lever 47 and extends downwardly through the spring 45 and through an opening in the spring seat 44 so as to hold the springin place. A foot lever 51 is connected to a bearing 52 extending upwardly from the base 1 at the opposite side of the post 3 from the bearing 34. A link 53 is connected to the lever 51 and extends upwardly loosely through the lever 47 and a rnut'54 is placed upon the upper end ofthe link. The tension of the spring 45 is exerted to yhold the forward end of the lever 47 elevated.to a limited extent. A fork 55 ,is

,formed at the forward Vend of the lever 47 rand straddles the upper end of the cam shaft 38. A bearing face 56 is formed upon the upper end -of the hub ofthe friction disk 41 and rollers 57 and 58 are connected to the larms of the fork 55 and bear upon the face 56. A bearing plate 59 is fixed upon the eX- treme upper end of the cam shaft 38 on top of the rollers 57 and 58. A pin GO is fixed through an opening in the plunger 2O and extends into a slot 61 in the cani shaft 38 so that the cam shaft may reciprocate in the plunger 20 and so that the plunger 20 will be rotated by the rotation of the cam shaft,

. the cam shaft 38 being rotated by the contact of the friction disk 41 with the friction wheel 18, and so that the plunger 2O may be reciprocated in the bearing 7.

Arms 627 63 and 64 extend radially from the lower end of the Yhead 21.and webs v65, 66V

and 67 extend.fromthehead 21 between the arms 62, 63y and 64 the .lowerface 68 of the arms'and webs being flat and at right angles to the bore 40. A bore 69 is formed through. 4the head 21 across the bore 40 into 'ea'eh-`ar1n Y 62, 63 and 64 t0 formthe Vspring seat and plunger vseat 7() and a bearing bore 71 eX- tends'froin the spring seat V70 t0 the end of the arm. VThe spring 72 fits in the spring seat 70, the plunger head 73 i'tsagainstthe spring, a ball 7 4 is mounted in the inner face of the plunger head 73 tobe engaged by the cam 39and a stem 7 5 extends from the plunger head 73 through the spring'7 2 and lits in the bearing bore 71 and has a bearing ball 7G at its outerend. ,I l

The can 5dias a rim 77 and a cap 7 8 is placed upon the rim 77. I Thefootlever 33 is operated to press the head 21,V downwardly into the cap78and press the'cap downwardly through ,the-rim 77. Then the foot leverl is operated to press the cam 39 downwardly againstV the balls74 and press Vthe balls 76 outwardly inside of thev rim? 9 of the capV 78 below the riin77 and the friction wheel 41 engages the friction wheel 18 and rotates the cam shaft l38 thereby ,rotat-fV ing the head'21 and causing the balls 7 6 to run around insideof the rim 79 of the cap 78 and press the metal outwardly lbelowthe rim 77V so as t0 firmly -hold the cap 78 in place. Then the footlevers 33 and 51 are Y released and the partsreturn to vtheir normal positions V and the sealed can 5 may be removed from the platform 4.,

The operator maysit upon a benclrand operate the'foot lever 33 with one foot andV the foot lever lwith the other foot, or he may standluponphis heels and operate the levers with his toes. v

Various changes may be made without declaimed. Y

claim:V .n 1,. A friction top can sealerxcomprisinga hase, a post extending;upwardly from the base, a platform extending forwardly' fromin the bearing bracket, a plunger slidably and'r rotatably mounted in the bearing, a cam shaftV slidably mountedV in the plunger and fixed for partingfrom the spiritfofmy invention as rotation therewith, a lever pivotally' connected .at its'rea-r end and havingra fork bearing downwardly uponthe plunger, a 'springl bearing upwardly on the plunger, a fric-Vv tion disk fixed upon the upper end of the cam shaft in condition to engage the friction Wheel, a second lever pivotally connected to an arm extending from the post and bearing upon the hub of the friction wheel, a bearing plate above the lever, foot levers pivotally connected to theV base, links connecting the foot levers to the first and second levers, a head upon the plunger and having a fiat lower face and circular periphery, plungers radially mounted in the head, a cam upon the lower end of the cam shaft for operating the radial plungers, and balls atA the outer ends of the radial plungers.

2. In a frictionl top can sealer a head, plungers radially mounted in the head, means for operating the head to press a can cap into place, means for rotating said head, and a cam movable to engage the radial plungers for operating the same so as to expand the rim of the can cap.

In a friction top can sealer, a head, plungers radially mounted in the head, means for operating the head to a can cap into place, a. cam movable to engage the radial plungers for operating the same so as to expand the rim of the can cap, means for moving said cam, and means for rotating said head, the two last mentioned means being dependently actuated.

e. In a friction top can sealer, a shaft housing pivotally mounted, a shaft in the shaft housing, a pulley upon one end of the shaft, a friction wheel upon the other end of the shaft, a spring for T,iieldingly supporting' the housing, a vertical bearing, a plunger1 in the vertical bearing, a head upon the lower end of the plunger, expanding means carried by the head, la cam shaft mounted in the plunger and having a cam for operatingthe expanding means, means for lowering the plunger, means for lowering the cam shaft, and a friction disk upon the cam shaft to engage the friction wheel.

5. In a friction top can sealer, a shaft housing pivotally mounted and spring supported, a. friction wheel upon the shaft housing, a plunger having expanding means at its lower end, a cam shaft mounted through the plunger for operating the expanding means and adapted to rotate the plunger, and a friction disk upon the cam shaft and adapted to engage the friction wheel.

6. In a friction top can sealer, a head having a flat lower face and a circular periphery, expanding plungers radially mounted in the head and exten-.flingl from the periphery and having expanding means at their outer ends, a moving plunger for operating the head up and down, a cam shaft slidingly mounted in the moving plunger and fixed for rotation with the same, means for reciprocating the moving` plunger, means for reciprocating the cam shaft, and means for rotating the cam shaft to rotate the ex panding means.

7. In a friction top can sealer, a head, plung-ers radially mounted in the head, a cam shaft axially movable through said head and fixed for rotation with the same, and means for axially moving said cam shaft and rotating the same and said head, the movement of said cam shaft Operating` said radial plungers.

8. In a friction top can sealer, a head, lever mechanism for axially moving said head, plungers radially mounted in the head, means for rotating said head, and a cam shaft extending through said head and axially movable to engage said radial plungers for operating the same.

9. In a friction top can sealer, a head, means for axially moving said head, plungers radially mounted in the head, a cam shaft axially movable through said head and fixed for rotation with the same, and means for axially moving said cam shaft and rotating the same and said head, the movement of said cam shaft operating said radial plungers.

l0. In a friction top can sealer, plungers, expanding means carried by said plungers, a cam extending between said plungers and arranged for axial movement to operate "said expanding means, said cam being rotatably fixed relative to said plungers, rotating drivinO: means, and a driving connection operable between said drivingmeans and said cam when said cam is axially moved to operative position.

1l. In a friction top-can sealer, plungers, expanding' means carried by said plungers, a cam extending between said plungers and arranged for axial movement to operate said expanding means, said cam being rotatably fixed relative to said plungers, a bearing arranged for swinging movement axially of said cam and plungers, a drive shaft in said bearing, and a driving` connection operable between said shaft and said cam when said cam is axially moved to operative position.

12. In a friction top can sealer, a support, a head arranged for axial movement, expanding means carried by said head, a cam shaft extending through said hea-d and arranged for axial movement to operate said expanding means, levers for said head and cam shaft carried by the support, and independent operating mechanism for each of said levers for respectively actuating said head and cam shaft.

In testimony whereof I have signed my name to this specification.

FRANK CRAWFORD. 

